Add table of contents to about page (#11885)

Move public domain blocks information to about page

app/controllers/about_controller.rb

@@ -3,9 +3,7 @@
 class AboutController < ApplicationController
   layout 'public'
 
-  before_action :require_open_federation!, only: [:show, :more, :blocks]
-  before_action :check_blocklist_enabled, only: [:blocks]
-  before_action :authenticate_user!, only: [:blocks], if: :blocklist_account_required?
+  before_action :require_open_federation!, only: [:show, :more]
   before_action :set_body_classes, only: :show
   before_action :set_instance_presenter
   before_action :set_expires_in, only: [:show, :more, :terms]
@@ -16,15 +14,20 @@ class AboutController < ApplicationController
 
   def more
     flash.now[:notice] = I18n.t('about.instance_actor_flash') if params[:instance_actor]
+
+    toc_generator = TOCGenerator.new(@instance_presenter.site_extended_description)
+
+    @contents          = toc_generator.html
+    @table_of_contents = toc_generator.toc
+    @blocks            = DomainBlock.with_user_facing_limitations.by_severity if display_blocks?
   end
 
   def terms; end
 
-  def blocks
-    @show_rationale = Setting.show_domain_blocks_rationale == 'all'
-    @show_rationale |= Setting.show_domain_blocks_rationale == 'users' && !current_user.nil? && current_user.functional?
-    @blocks = DomainBlock.with_user_facing_limitations.order('(CASE severity WHEN 0 THEN 1 WHEN 1 THEN 2 WHEN 2 THEN 0 END), reject_media, domain').to_a
-  end
+  helper_method :display_blocks?
+  helper_method :display_blocks_rationale?
+  helper_method :public_fetch_mode?
+  helper_method :new_user
 
   private
 
@@ -32,28 +35,14 @@ class AboutController < ApplicationController
     not_found if whitelist_mode?
   end
 
-  def check_blocklist_enabled
-    not_found if Setting.show_domain_blocks == 'disabled'
-  end
-
-  def blocklist_account_required?
-    Setting.show_domain_blocks == 'users'
+  def display_blocks?
+    Setting.show_domain_blocks == 'all' || (Setting.show_domain_blocks == 'users' && user_signed_in?)
   end
 
-  def block_severity_text(block)
-    if block.severity == 'suspend'
-      I18n.t('domain_blocks.suspension')
-    else
-      limitations = []
-      limitations << I18n.t('domain_blocks.media_block') if block.reject_media?
-      limitations << I18n.t('domain_blocks.silence') if block.severity == 'silence'
-      limitations.join(', ')
-    end
+  def display_blocks_rationale?
+    Setting.show_domain_blocks_rationale == 'all' || (Setting.show_domain_blocks_rationale == 'users' && user_signed_in?)
   end
 
-  helper_method :block_severity_text
-  helper_method :public_fetch_mode?
-
   def new_user
     User.new.tap do |user|
       user.build_account
@@ -61,8 +50,6 @@ class AboutController < ApplicationController
     end
   end
 
-  helper_method :new_user
-
   def set_instance_presenter
     @instance_presenter = InstancePresenter.new
   end

app/javascript/styles/mastodon/about.scss

@@ -17,109 +17,102 @@ $small-breakpoint: 960px;
 
 .rich-formatting {
   font-family: $font-sans-serif, sans-serif;
-  font-size: 16px;
+  font-size: 14px;
   font-weight: 400;
-  font-size: 16px;
-  line-height: 30px;
+  line-height: 1.7;
+  word-wrap: break-word;
   color: $darker-text-color;
-  padding-right: 10px;
 
   a {
     color: $highlight-text-color;
     text-decoration: underline;
+
+    &:hover,
+    &:focus,
+    &:active {
+      text-decoration: none;
+    }
   }
 
   p,
   li {
-    font-family: $font-sans-serif, sans-serif;
-    font-size: 16px;
-    font-weight: 400;
-    font-size: 16px;
-    line-height: 30px;
-    margin-bottom: 12px;
     color: $darker-text-color;
+  }
 
-    a {
-      color: $highlight-text-color;
-      text-decoration: underline;
-    }
+  p {
+    margin-top: 0;
+    margin-bottom: .85em;
 
     &:last-child {
       margin-bottom: 0;
     }
   }
 
-  strong,
-  em {
+  strong {
     font-weight: 700;
-    color: lighten($darker-text-color, 10%);
+    color: $secondary-text-color;
   }
 
-  h1 {
-    font-family: $font-display, sans-serif;
-    font-size: 26px;
-    line-height: 30px;
-    font-weight: 500;
-    margin-bottom: 20px;
+  em {
+    font-style: italic;
     color: $secondary-text-color;
+  }
 
-    small {
-      font-family: $font-sans-serif, sans-serif;
-      display: block;
-      font-size: 18px;
-      font-weight: 400;
-      color: lighten($darker-text-color, 10%);
-    }
+  code {
+    font-size: 0.85em;
+    background: darken($ui-base-color, 8%);
+    border-radius: 4px;
+    padding: 0.2em 0.3em;
   }
 
-  h2 {
+  h1,
+  h2,
+  h3,
+  h4,
+  h5,
+  h6 {
     font-family: $font-display, sans-serif;
-    font-size: 22px;
-    line-height: 26px;
+    margin-top: 1.275em;
+    margin-bottom: .85em;
     font-weight: 500;
-    margin-bottom: 20px;
     color: $secondary-text-color;
   }
 
+  h1 {
+    font-size: 2em;
+  }
+
+  h2 {
+    font-size: 1.75em;
+  }
+
   h3 {
-    font-family: $font-display, sans-serif;
-    font-size: 18px;
-    line-height: 24px;
-    font-weight: 500;
-    margin-bottom: 20px;
-    color: $secondary-text-color;
+    font-size: 1.5em;
   }
 
   h4 {
-    font-family: $font-display, sans-serif;
-    font-size: 16px;
-    line-height: 24px;
-    font-weight: 500;
-    margin-bottom: 20px;
-    color: $secondary-text-color;
+    font-size: 1.25em;
   }
 
-  h5 {
-    font-family: $font-display, sans-serif;
-    font-size: 14px;
-    line-height: 24px;
-    font-weight: 500;
-    margin-bottom: 20px;
-    color: $secondary-text-color;
+  h5,
+  h6 {
+    font-size: 1em;
   }
 
-  h6 {
-    font-family: $font-display, sans-serif;
-    font-size: 12px;
-    line-height: 24px;
-    font-weight: 500;
-    margin-bottom: 20px;
-    color: $secondary-text-color;
+  ul {
+    list-style: disc;
+  }
+
+  ol {
+    list-style: decimal;
   }
 
   ul,
   ol {
-    margin-left: 20px;
+    margin: 0;
+    padding: 0;
+    padding-left: 2em;
+    margin-bottom: 0.85em;
 
     &[type='a'] {
       list-style-type: lower-alpha;
@@ -130,31 +123,22 @@ $small-breakpoint: 960px;
     }
   }
 
-  ul {
-    list-style: disc;
-  }
-
-  ol {
-    list-style: decimal;
-  }
-
-  li > ol,
-  li > ul {
-    margin-top: 6px;
-  }
-
   hr {
     width: 100%;
     height: 0;
     border: 0;
-    border-bottom: 1px solid rgba($ui-base-lighter-color, .6);
-    margin: 20px 0;
+    border-bottom: 1px solid lighten($ui-base-color, 4%);
+    margin: 1.7em 0;
 
     &.spacer {
       height: 1px;
       border: 0;
     }
   }
+
+  & > :first-child {
+    margin-top: 0;
+  }
 }
 
 .information-board {
@@ -416,7 +400,7 @@ $small-breakpoint: 960px;
   }
 
   &__call-to-action {
-    background: darken($ui-base-color, 4%);
+    background: $ui-base-color;
     border-radius: 4px;
     padding: 25px 40px;
     overflow: hidden;

app/javascript/styles/mastodon/containers.scss

@@ -141,6 +141,63 @@
     grid-row: 3;
   }
 
+  @media screen and (max-width: $no-gap-breakpoint) {
+    grid-gap: 0;
+    grid-template-columns: minmax(0, 100%);
+
+    .column-0 {
+      grid-column: 1;
+    }
+
+    .column-1 {
+      grid-column: 1;
+      grid-row: 3;
+    }
+
+    .column-2 {
+      grid-column: 1;
+      grid-row: 2;
+    }
+
+    .column-3 {
+      grid-column: 1;
+      grid-row: 4;
+    }
+  }
+}
+
+.grid-4 {
+  display: grid;
+  grid-gap: 10px;
+  grid-template-columns: 1fr 1fr 1fr 1fr;
+  grid-auto-columns: 25%;
+  grid-auto-rows: max-content;
+
+  .column-0 {
+    grid-column: 1 / 5;
+    grid-row: 1;
+  }
+
+  .column-1 {
+    grid-column: 1 / 4;
+    grid-row: 2;
+  }
+
+  .column-2 {
+    grid-column: 4;
+    grid-row: 2;
+  }
+
+  .column-3 {
+    grid-column: 2 / 5;
+    grid-row: 3;
+  }
+
+  .column-4 {
+    grid-column: 1;
+    grid-row: 3;
+  }
+
   .landing-page__call-to-action {
     min-height: 100%;
   }
@@ -190,6 +247,11 @@
 
     .column-3 {
       grid-column: 1;
+      grid-row: 5;
+    }
+
+    .column-4 {
+      grid-column: 1;
       grid-row: 4;
     }
   }

app/javascript/styles/mastodon/widgets.scss

@@ -128,41 +128,43 @@
   margin-bottom: 10px;
 }
 
-.contact-widget,
-.landing-page__information.contact-widget {
-  box-sizing: border-box;
-  padding: 20px;
-  min-height: 100%;
-  border-radius: 4px;
-  background: $ui-base-color;
-  box-shadow: 0 0 15px rgba($base-shadow-color, 0.2);
-}
-
 .contact-widget {
+  min-height: 100%;
   font-size: 15px;
   color: $darker-text-color;
   line-height: 20px;
   word-wrap: break-word;
   font-weight: 400;
+  padding: 0;
 
-  strong {
-    font-weight: 500;
+  h4 {
+    padding: 10px;
+    text-transform: uppercase;
+    font-weight: 700;
+    font-size: 13px;
+    color: $darker-text-color;
   }
 
-  p {
-    margin-bottom: 10px;
-
-    &:last-child {
-      margin-bottom: 0;
-    }
+  .account {
+    border-bottom: 0;
+    padding: 10px 0;
+    padding-top: 5px;
   }
 
-  &__mail {
-    margin-top: 10px;
+  & > a {
+    display: inline-block;
+    padding: 10px;
+    padding-top: 0;
+    color: $darker-text-color;
+    text-decoration: none;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
 
-    a {
-      color: $primary-text-color;
-      text-decoration: none;
+    &:hover,
+    &:focus,
+    &:active {
+      text-decoration: underline;
     }
   }
 }
@@ -562,3 +564,38 @@ $fluid-breakpoint: $maximum-width + 20px;
     }
   }
 }
+
+.table-of-contents {
+  background: darken($ui-base-color, 4%);
+  min-height: 100%;
+  font-size: 14px;
+  border-radius: 4px;
+
+  li a {
+    display: block;
+    font-weight: 500;
+    padding: 15px;
+    overflow: hidden;
+    white-space: nowrap;
+    overflow: hidden;
+    text-overflow: ellipsis;
+    text-decoration: none;
+    color: $primary-text-color;
+    border-bottom: 1px solid lighten($ui-base-color, 4%);
+
+    &:hover,
+    &:focus,
+    &:active {
+      text-decoration: underline;
+    }
+  }
+
+  li:last-child a {
+    border-bottom: 0;
+  }
+
+  li ul {
+    padding-left: 20px;
+    border-bottom: 1px solid lighten($ui-base-color, 4%);
+  }
+}

app/lib/toc_generator.rb

@@ -0,0 +1,69 @@
+# frozen_string_literal: true
+
+class TOCGenerator
+  TARGET_ELEMENTS = %w(h1 h2 h3 h4 h5 h6).freeze
+  LISTED_ELEMENTS = %w(h2 h3).freeze
+
+  class Section
+    attr_accessor :depth, :title, :children, :anchor
+
+    def initialize(depth, title, anchor)
+      @depth    = depth
+      @title    = title
+      @children = []
+      @anchor   = anchor
+    end
+
+    delegate :<<, to: :children
+  end
+
+  def initialize(source_html)
+    @source_html = source_html
+    @processed   = false
+    @target_html = ''
+    @headers     = []
+    @slugs       = Hash.new { |h, k| h[k] = 0 }
+  end
+
+  def html
+    parse_and_transform unless @processed
+    @target_html
+  end
+
+  def toc
+    parse_and_transform unless @processed
+    @headers
+  end
+
+  private
+
+  def parse_and_transform
+    return if @source_html.blank?
+
+    parsed_html = Nokogiri::HTML.fragment(@source_html)
+
+    parsed_html.traverse do |node|
+      next unless TARGET_ELEMENTS.include?(node.name)
+
+      anchor = node.text.parameterize
+      @slugs[anchor] += 1
+      anchor = "#{anchor}-#{@slugs[anchor]}" if @slugs[anchor] > 1
+
+      node['id'] = anchor
+
+      next unless LISTED_ELEMENTS.include?(node.name)
+
+      depth          = node.name[1..-1]
+      latest_section = @headers.last
+
+      if latest_section.nil? || latest_section.depth >= depth
+        @headers << Section.new(depth, node.text, anchor)
+      else
+        latest_section << Section.new(depth, node.text, anchor)
+      end
+    end
+
+    @target_html = parsed_html.to_s
+    @processed   = true
+  end
+end

app/models/domain_block.rb

@@ -26,6 +26,7 @@ class DomainBlock < ApplicationRecord
 
   scope :matches_domain, ->(value) { where(arel_table[:domain].matches("%#{value}%")) }
   scope :with_user_facing_limitations, -> { where(severity: [:silence, :suspend]).or(where(reject_media: true)) }
+  scope :by_severity, -> { order(Arel.sql('(CASE severity WHEN 0 THEN 1 WHEN 1 THEN 2 WHEN 2 THEN 0 END), reject_media, domain')) }
 
   class << self
     def suspend?(domain)

app/views/about/blocks.html.haml

@@ -1,48 +0,0 @@
-- content_for :page_title do
-  = t('domain_blocks.title', instance: site_hostname)
-
-.grid
-  .column-0
-    .box-widget.rich-formatting
-      %h2= t('domain_blocks.blocked_domains')
-      %p= t('domain_blocks.description', instance: site_hostname)
-      .table-wrapper
-        %table.blocks-table
-          %thead
-            %tr
-              %th= t('domain_blocks.domain')
-              %th.severity-column= t('domain_blocks.severity')
-              - if @show_rationale
-                %th.button-column
-          %tbody
-            - if @blocks.empty?
-              %tr
-                %td{ colspan: @show_rationale ? 3 : 2 }= t('domain_blocks.no_domain_blocks')
-            - else
-              - @blocks.each_with_index do |block, i|
-                %tr{ class: i % 2 == 0 ? 'even': nil }
-                  %td{ title: block.domain }= block.domain
-                  %td= block_severity_text(block)
-                  - if @show_rationale
-                    %td
-                      - if block.public_comment.present?
-                        %button.icon-button{ title: t('domain_blocks.show_rationale'), 'aria-label' => t('domain_blocks.show_rationale') }
-                          = fa_icon 'chevron-down fw', 'aria-hidden' => true
-                - if @show_rationale
-                  - if block.public_comment.present?
-                    %tr.rationale.hidden
-                      %td{ colspan: 3 }= block.public_comment.presence
-      %h2= t('domain_blocks.severity_legend.title')
-      - if @blocks.any? { |block| block.reject_media? }
-        %h3= t('domain_blocks.media_block')
-        %p= t('domain_blocks.severity_legend.media_block')
-      - if @blocks.any? { |block| block.severity == 'silence' }
-        %h3= t('domain_blocks.silence')
-        %p= t('domain_blocks.severity_legend.silence')
-      - if @blocks.any? { |block| block.severity == 'suspend' }
-        %h3= t('domain_blocks.suspension')
-        %p= t('domain_blocks.severity_legend.suspension')
-        - if public_fetch_mode?
-          %p= t('domain_blocks.severity_legend.suspension_disclaimer')
-  .column-1
-    = render 'application/sidebar'

app/views/about/more.html.haml

@@ -5,7 +5,7 @@
   = javascript_pack_tag 'public', integrity: true, crossorigin: 'anonymous'
   = render partial: 'shared/og'
 
-.grid-3
+.grid-4
   .column-0
     .public-account-header.public-account-header--no-bar
       .public-account-header__image
@@ -28,22 +28,57 @@
             = image_tag @instance_presenter.mascot&.file&.url || asset_pack_path('media/images/elephant_ui_plane.svg'), alt: ''
 
   .column-2
-    .landing-page__information.contact-widget
-      %p
-        %strong= t 'about.administered_by'
+    .contact-widget
+      %h4= t 'about.administered_by'
 
       = account_link_to(@instance_presenter.contact_account)
 
       - if @instance_presenter.site_contact_email.present?
-        %p.contact-widget__mail
-          %strong
-            = succeed ':' do
-              = t 'about.contact'
-          %br/
-          = mail_to @instance_presenter.site_contact_email, nil, title: @instance_presenter.site_contact_email
+        %h4
+          = succeed ':' do
+            = t 'about.contact'
+
+        = mail_to @instance_presenter.site_contact_email, nil, title: @instance_presenter.site_contact_email
 
   .column-3
     = render 'application/flashes'
 
-    .box-widget
-      .rich-formatting= @instance_presenter.site_extended_description.html_safe.presence || t('about.extended_description_html')
+    - if @contents.blank? && (!display_blocks? || @blocks&.empty?)
+      = nothing_here
+    - else
+      .box-widget
+        .rich-formatting
+          = @contents.html_safe
+
+          - if display_blocks? && !@blocks.empty?
+            %h2#unavailable-content= t('about.unavailable_content')
+
+            %p= t('about.unavailable_content_html')
+
+            - @blocks.each do |domain_block|
+              %p
+                %strong= "#{domain_block.domain}:"
+
+                - if domain_block.suspend?
+                  = t('about.unavailable_content_description.suspended')
+                - else
+                  = t('about.unavailable_content_description.silenced') if domain_block.silence?
+                  = t('about.unavailable_content_description.rejecting_media') if domain_block.reject_media?
+
+                - if display_blocks_rationale?
+                  %strong= t('about.unavailable_content_description.reason')
+                  = domain_block.public_comment
+
+  .column-4
+    %ul.table-of-contents
+      - @table_of_contents.each do |item|
+        %li
+          = link_to item.title, "##{item.anchor}"
+
+          - unless item.children.empty?
+            %ul
+              - item.children.each do |sub_item|
+                %li= link_to sub_item.title, "##{sub_item.anchor}"
+
+      - if display_blocks? && !@blocks.empty?
+        %li= link_to t('about.unavailable_content'), '#unavailable-content'

config/locales/en.yml

@@ -17,9 +17,6 @@ en:
     contact_unavailable: N/A
     discover_users: Discover users
     documentation: Documentation
-    extended_description_html: |
-      <h3>A good place for rules</h3>
-      <p>The extended description has not been set up yet.</p>
     federation_hint_html: With an account on %{instance} you'll be able to follow people on any Mastodon server and beyond.
     generic_description: "%{domain} is one server in the network"
     get_apps: Try a mobile app
@@ -38,6 +35,13 @@ en:
     status_count_before: Who authored
     tagline: Follow friends and discover new ones
     terms: Terms of service
+    unavailable_content: Unavailable content
+    unavailable_content_description:
+      reason: 'Reason:'
+      rejecting_media: Media files from this server will not be processed and and no thumbnails will be displayed, requiring manual click-through to the other server.
+      silenced: Posts from this server will not show up anywhere except your home feed if you follow the author.
+      suspended: You won't be able to follow anyone from this server, and no data from it will be processed or stored, and no data exchanged.
+    unavailable_content_html: Mastodon generally allows you to view content from and interact with users from any other server in the fediverse. These are the exceptions that have been made on this particular server.
     user_count_after:
       one: user
       other: users
@@ -661,23 +665,6 @@ en:
     directory: Profile directory
     explanation: Discover users based on their interests
     explore_mastodon: Explore %{title}
-  domain_blocks:
-    blocked_domains: List of limited and blocked domains
-    description: This is the list of servers that %{instance} limits or reject federation with.
-    domain: Domain
-    media_block: Media block
-    no_domain_blocks: "(No domain blocks)"
-    severity: Severity
-    severity_legend:
-      media_block: Media files coming from the server are neither fetched, stored, or displayed to the user.
-      silence: Accounts from silenced servers can be found, followed and interacted with, but their toots will not appear in the public timelines, and notifications from them will not reach local users who are not following them.
-      suspension: No content from suspended servers is stored or displayed, nor is any content sent to them. Interactions from suspended servers are ignored.
-      suspension_disclaimer: Suspended servers may occasionally retrieve public content from this server.
-      title: Severities
-    show_rationale: Show rationale
-    silence: Silence
-    suspension: Suspension
-    title: "%{instance} List of blocked instances"
   domain_validator:
     invalid_domain: is not a valid domain name
   errors:

config/routes.rb

@@ -441,7 +441,6 @@ Rails.application.routes.draw do
 
   get '/about',        to: 'about#show'
   get '/about/more',   to: 'about#more'
-  get '/about/blocks', to: 'about#blocks'
   get '/terms',        to: 'about#terms'
 
   match '/', via: [:post, :put, :patch, :delete], to: 'application#raise_not_found', format: false